Foundations of Astronomy (MindTap Course List)
Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 11, Problem 19RQ
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Explain the way which very high temperature sensitivity of CNO cycle will influence the structure of stars.

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For a main sequence star with luminosity L, how many kilograms of hydrogen is being converted into helium per second? Use the formula that you derive to estimate the mass of hydrogen atoms that are converted into helium in the interior of the sun (LSun = 3.9 x 1026 W). (Note: the mass of a hydrogen atom is 1 mproton and the mass of a helium atom is 3.97 mproton. You need four hydrogen nuclei to form one helium nucleus.)
What is the element that was mostly produced in both processes (PPCR and CNO cycle) and what is the significance to the life cycle of stars?
Select all of the statements about the main sequence stage in the life of a star that are TRUE:   All stars spend the majority of their lives in the main sequence stage.   Most stars lose a significant amount of mass while they are on the Main Sequence.   Different stars spend a different amounts of time (number of years) in the main sequence stage, depending on the characteristics they were born with.   Main sequence stars are rare in the Galaxy, so we are lucky to be living around one.   During the main sequence stage, energy to power the star is provided by the fusion of hydrogen.
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